How to get server_id in MySQL?

To get the server_id, use the system defined variable @@server_id. You cannot use only a single @ as user defined variable for server_id.

The syntax is as follows

SELECT@@ server_id

As an alternate, you can use SHOW VARIABLES command.

The syntax is as follows

SHOW VARIABLES LIKE ‘server_id’;

Case 1The query is as follows

mysql> SELECT @@server_id as SERVER_ID;

The following is the output

+-----------+
| SERVER_ID |
+-----------+
|         1 |
+-----------+
1 row in set (0.00 sec)

Case 2The query is as follows

mysql> show variables like 'server_id';

The following is the output

+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| server_id     | 1     |
+---------------+-------+
1 row in set (0.01 sec)